Top Gear is worse for you than smoking - Jeremy's in trouble! According to a study published by the British Journal of Sports Medicine, watching TV – yes, that means even Top Gear – is more detrimental to your health than smoking. The barking mad boffins who did the study concluded that for every hour of TV you watch you will lose 22 minutes from your life.

BMW has previewed key exterior styling elements, contemporary interior design touches, lightweight carbon fiber construction and innovative lighting systems to be incorporated on next year's sixth-generation 7-series with the unveiling of an arresting new concept car that goes under the name Vision Future Luxury. Revealed at the Beijing auto show, the big new sedan is described as a showcase for future BMW models. But while initial speculation suggested the Vision Future Luxury pointed at a possible 9-series flagship model to be installed at the top of the German car maker's lineup, BMW officials have confirmed the new concept was created more specifically as a pointer to the next 7-series, which is planned to head into North American showrooms late next year.

Porsche has revealed the new 911 991 Turbo Cabriolet and Turbo S Cabriolet range – a 197mph open-top Porsche 911. Boasting 520hp even in standard Turbo guise, and a huge 560hp in Turbo S form, the new 911 991 Turbo Cabriolet range follows hot on the heels of the new 911 991 Turbo coupe range, which MSN Cars drove back in August. Click on the image above to see how Porsche has turned a hard-top Turbo into an open-top barnstormer…